Search found 4 matches

by markus_a
Tue Dec 08, 2015 9:49 am
Forum: LK/ELK/VK/PK/OK/MX/GLK/EGLK/GVK/GLT
Topic: GLK19264A-7T-1U-USB only generates echo after booting
Replies: 7
Views: 3368

Re: GLK19264A-7T-1U-USB only generates echo after booting

HI Daniel,

of course the cleanest way to solve the problem is to prevent any process from talking to the display without knowing what it is doing. But the idea of locking the display while the intended program is not running is a good workaround.

Thanks for your help!
Markus
by markus_a
Fri Dec 04, 2015 4:28 am
Forum: LK/ELK/VK/PK/OK/MX/GLK/EGLK/GVK/GLT
Topic: GLK19264A-7T-1U-USB only generates echo after booting
Replies: 7
Views: 3368

Re: GLK19264A-7T-1U-USB only generates echo after booting

Hi Daniel, the other commands were echoed as well, but I found an explanation for this. After continuously sending text to the display for about one minute the display went back to normal operation. That suggests that some process during startup sent the echo command (FE FF). Is there any other chan...
by markus_a
Wed Dec 02, 2015 11:22 am
Forum: LK/ELK/VK/PK/OK/MX/GLK/EGLK/GVK/GLT
Topic: GLK19264A-7T-1U-USB only generates echo after booting
Replies: 7
Views: 3368

Re: GLK19264A-7T-1U-USB only generates echo after booting

Hi Daniel, for testing the program is started manually, so the booting process should be finished. Here is an excerpt of the code I am using: struct termios term; int lcd = open("/dev/ttyUSB0", O_RDWR | O_NOCTTY | O_SYNC); term.c_cflag = BAUDRATE | CS8 | CLOCAL | CREAD; term.c_iflag = 0; term.c_ofla...
by markus_a
Tue Dec 01, 2015 8:17 am
Forum: LK/ELK/VK/PK/OK/MX/GLK/EGLK/GVK/GLT
Topic: GLK19264A-7T-1U-USB only generates echo after booting
Replies: 7
Views: 3368

GLK19264A-7T-1U-USB only generates echo after booting

Hi, I'm writing a small C program to control the display from my CentOS-6-Box. The first command (after setting up the baud rate etc.) sent to the display is "Read Module Type" (0xFE 0x37), so I would expect to get a single byte (0x27) in return. This works fine when I plug in the display when the c...